Paris. Fresh clashes in the "yellow vest" fuel price protests across France led to more injuries on Sunday, adding to the more than 400 already reported by the government, as some demonstrators vowed to continue their action over the coming days.reported AFP.

AFP journalists across France reported that the protests appeared to be less widespread than Saturday, when close to 300,000 people participated, but there were again clashes with police -- and sometimes motorists.

Police were searching for a driver who forced a road block at Saint-Quentin, northeast France, leaving one protestor seriously injured.

And police used tear gas to break up a gathering of about a thousand protestors near the northern city of Caen, after the vandalism of traffic radar and the burning of wooden pallets.

The protesters, nicknamed "yellow vests" for the high-visibility jackets they wear, blocked roundabouts, major highways and thoroughfares on Saturday to express anger over increased taxes on fuel and their shrinking purchasing power under President Emmanuel Macron.

Interior Minister Christophe Castaner reported that the first day and night of protests had left one person dead and more than 400 people hurt, 14 of them seriously.

French retail group Auchan reported violent incidents at around 20 shopping centres where it operates hypermarkets.

The injured, 409 in total, included 28 police, paramilitary police or firefighters.

- 'Idiotic behaviour' -
Castaner told RTL radio that 288,000 people had taken part in Saturday's protests at 2,034 locations countrywide. About 3,500 stayed out overnight, he added.

Police questioned nearly 300 protesters, and took about half of them into custody.

"Last night was restive... There were assaults, fights, stabbings," Castaner said. "There were fights among 'yellow vest' protesters. There was a lot of alcohol at certain venues, which led to this idiotic behaviour."

Budget Minister Gerald Darmanin said Sunday the government was aware of unhappiness over high fuel taxes, but said it had "a duty" to transform the French economy with the aim of making it less oil-dependent.

A poll published Sunday in the Journal de Dimanche weekly said that 62 percent of those questioned believed their purchasing power was more important than a fast transition towards renewable energy.

Tempers flared at times as some drivers confronted the protesters or tried to force their way through barricades.

In the eastern Savoie region, authorities said a woman trying to get her daughter to a doctor panicked after protesters surrounded her car and banged on the roof. She accelerated into the crowd and killed a 63-year-old woman.

The driver was on Sunday charged with manslaughter before being released on conditional bail, prosecutors said.

- More to come? -
In several spots across the country protesters vowed to carry on their action on Monday and beyond.

A spokesman for the movement in the western region of Morbihan said "tomorrow we will be joined by lorry drivers", while in the city of Le Mans, southwest of Paris, protesters said that farmers would help them block a major motorway, the A28 leading up to the Picardy coast.

"There are many young people among us because we can't make ends meet anymore," said Emilie, a 27-year old temporary sales manager in Cavaillon in the south of the country.

"We work like slaves and at some point enough is enough. We have no life, we're just surviving," she said.

Analysts say the movement has come to represent more widespread frustration against Macron, a former investment banker who has pushed through a series of reforms aimed at bolstering economic growth.

A poll published in the Journal du Dimanche meanwhile indicated that Macron's popularity had dipped a further four points to 25 percent.